Cosmetics

ABSTRACT

Cosmetics containing the following components (A) and (B): (A) an oil-absorbing powder having a squalane-absorbing ability of 1 ml/g or more; and (B) a compound having an affinity for component (A) lower than that of sebum, and having an ability to absorb the sebum and release component (B) in exchange for the sebum when the cosmetic is applied onto the skin. These cosmetics can adequately absorb the sebum and thus exhibit excellent effects of relieving or preventing oiliness of the skin and worsening in makeup. By selecting an appropriate compound to be released in exchange for the absorbed sebum, a substance capable of improving the skin qualities such as moistness, tightness, and tension can be allowed to penetrate into the skin. Moreover, a bodily feeling of the removal of the sebum can be imparted to users thereby.

TECHNICAL FIELD

[0001] The present invention relates to cosmetics used for applying oradhering onto the skin such as face for sebum absorption.

BACKGROUND

[0002] On the surface of epidermis, a thin sebaceous film is formed.Such film has actions for preventing foreign matters in the environmentfrom entering into the epidermis, for protecting the skin fromirritation of various substances, or minimizing moisture loss forhumectating the skin surface. On the other hand, an excess sebum causesan oily feeling in touch, greasy and shiny skin and worsening in makeup,and also causes seborrheic dermatitis such as acne.

[0003] Therefore, several methods such as those for physiologicallysuppressing the sebaceous secretion using pharmacologically activesubstances and physically absorbing an excessively secreted sebum withan oil-adsorbing substance have been examined. However, any usefulpharmacologically active substance effective for sebum suppression hasnot been discovered, and is not in practical use.

[0004] A method for removing an excess sebum in the latter using agrease-absorbing paper is known, but this method is not satisfactory ina sebum-absorbing ability, though acceptable as a first-aid treatment.Further, for example, a pack containing lipophilic titanium dioxide orlipophilic silicon dioxide (JP-A-57-112314); a cosmetic containinghealstone (Bakuhanseki) powder with a median particle diameter of 5-15μm (JP-A-09-263528); and a cosmetic sheet containing porous granules(microcapsules) encapsulating a functional treating agent attached ontothe surface or inside of a sheet material (JP-A-02-36114) have beenproposed, but these are not satisfactory for practical use and insebum-absorbing ability, and further are deficient in an actual feelingof the removal of the sebum as compared with the grease-absorbing paper.In order to improve an actual feeling of sebum-free, for example, in thegrease-absorbing paper, a method is known in which a pattern on thepaper disappears or becomes clear when sebum is absorbed(JP-A-10-298030), but the method can not be broadly applied for varioustypes of cosmetics.

[0005] In JP-A-2001-72566, a sheet-like pack cosmetic comprising anoil-absorbing powder, which absorbs a specific amount of squalane, isdescribed. This pack cosmetic is superior in sebum-absorbing ability aswell as in improving and preventing worsening in makeup; however, inorder to supplement effects such as moistness, tightness and tension,additional cosmetics such as lotion and cream have to be used.

[0006] An object of the present invention is to provide a cosmetic whichcan adequately absorb sebum and thus exhibit a superior effect ofimproving or preventing oiliness of the skin and worsening in makeup, iseasy to use, imparts an actual feeling of the removal of the sebum tousers, as well as effectively provides a substance having an ability toimprove the skin qualities such as moistness, tightness and tension tothe skin.

DISCLOSURE OF THE INVENTION

[0007] The present inventors have found that combined use of anoil-absorbing powder having a specific squalane-absorbing ability(squalane-absorptivity) and a compound having an affinity for saidoil-absorbing powder lower than that of sebum can adequately absorb thesebum, thus leading to exhibiting a superior effect in improving orpreventing oiliness of the skin and worsening in makeup. Further, thepresent inventors have found that, by suitably selecting a compoundhaving an affinity for the oil-absorbing powder lower than the affinityof sebum, a component which improves the skin qualities such asmoistness, tightness and tension can be released from the cosmetic inexchange for the absorbed sebum, and thus allowed to penetrateeffectively into the skin, and also found that such cosmetics can beobtained which are superior in the effect of imparting a bodily feelingof the safe removal of the sebum to users.

[0008] The present invention provides a cosmetic comprising thefollowing components (A) and (B):

[0009] (A) an oil-absorbing powder having a squalane-absorbing abilityof 1 ml/g or more;

[0010] (B) a compound having an affinity for component (A) lower thanthat of sebum, and having an ability to absorb the sebum and releasecomponent (B) in exchange for the sebum when the cosmetic is appliedonto the skin.

BEST MODE FOR CARRYING OUT THE INVENTION

[0011] The cosmetic of the present invention can be produced by mixingcomponent (A) and component (B) or an aqueous medium dissolvingcomponent (B), and homogeneously dispersing the components. A state of“homogeneously dispersed” means a state in which the surface of thepowder of component (A) is sufficiently wetted with component (B) or anaqueous medium dissolving component (B), and component (B) or theaqueous medium dissolving component (B) is incorporated into the spacesamong the particles of the powder. Further, the phrase “absorb sebum andthen release component (B) in exchange for the sebum when applied to theskin” means that, since component (A) has an affinity for sebum, i.e. anoil, higher than that of component (B) or an aqueous medium dissolvingcomponent (B), and is easily wetted with sebum, when the cosmetic of thepresent invention comes into contact with the sebum, the sebum issurrounded by the periphery of component (A), and as a result, component(B), which has an affinity lower than that of sebum, is released inexchange for the sebum.

[0012] The oil-absorbing powder of component (A) used in the presentinvention has a squalane-absorptivity of 1 ml/g or more, preferably 1.5ml/g or more to absorb sebum sufficiently.

[0013] The squalane-absorptivity used herein is a value as measuredaccording to the method for measurement of oil-absorptivity of dyestuffsdefined in JIS K5101 (1978). Namely, 1 g of powder is weighed on a glassplate, and added dropwise with squalane thereon while kneading withspatula to prepare a paste. An end point of addition is set at the timewhen the powder takes totally a paste form, and the amount of squalane(ml) at the end point is defined as a value of oil-absorptivity (ml/g).

[0014] Examples of the oil-absorbing powder include vinyl polymersobtained by polymerizing one or more monomers such as vinyl acetate,N-vinylpyrrolidone, methacrylates, acrylates, styrene anddivinylbenzene; nylon; and silicic anhydride. These powders arepreferably porous, and a squalane-absorptivity can be adjusted by aconventional method.

[0015] Among them, a lipophilic oil-absorbing powder of vinyl polymers,nylon or the like is preferable since the oil-absorptivity thereof isnot decreased by water or sweat.

[0016] The above-mentioned vinyl polymer is preferably a porouslipophilic polymer obtained by polymerizing one or more vinyl monomershaving a solubility parameter of 7-10. The vinyl monomer having asolubility parameter of 7-10 includes, for example, (meth)acrylic acid;diolefins having 4 to 6 carbon atoms; styrene or styrene derivativeshaving a hydrocarbon substituent having 1 to 12 carbon atoms; esters of(meth)acrylic acid and higher alcohols having 8 to 24 carbon atoms; andesters such as vinyl esters of saturated carboxylic acids having 8 to 20carbon atoms. Superior compatibility with sebum and a highsebum-absorptivity can be obtained by the monomers having a solubilityparameter of 7-10.

[0017] In the present invention, preferably the oil-absorbing powder isswollen with sebum, but not be soluble in sebum from the viewpoint offeeling, and thus is preferably cross-linked. Cross-linking can beperformed by adding polyfunctional monomer in a polymerization process,by post-crosslinking, or by self-crosslinking. The polyfunctionalmonomers include, for example, divinylbenzene, divinylpyridine, ethyleneglycol di(meth)acrylate and triethyleneglycol di(meth)acrylate.

[0018] Polymerization of the above-mentioned vinyl monomers andformation of a porous structure are preferably performed, for example,by a method described in JP-A-63-316715, namely, a method comprisingdissolving a monomer in a non-polymerizable organic solvent,polymerizing the solution in a state suspended, dispersed or emulsifiedin water, and removing said organic solvent after termination of thepolymerization.

[0019] Commercially available examples of such oil-absorbing powderinclude porous nylon powders such as Orgasol 2002 (Elf Autochem. Corp.);a cross-linked elastomer of dimethyl silicone such as Torayfil E-506C(Dow Corning Toray Silicone Co. Ltd.); polymethyl methacrylates such asMicrosphere M-100, Microsphere M-300, Microsphere M-400 and MicrosphereR-109 (Matsumoto Yushi Co. Ltd.); and methacrylate copolymers such asPolytrap (Dow Corning Inc.).

[0020] The oil-absorbing powder used in the present invention has a meanparticle diameter of 0.005-30 μm, preferably 0.005-20 μm, as measured bya laser diffraction/scattering method. Further, in the oil-absorbingpowder, particles having a particle diameter in a range of 0.005-30μmamount to preferably 90% by weight or more.

[0021] A mixture of two or more of the oil-absorbing powders may beused, and is contained in 10-60% by weight, preferably in 30-60% byweight of the whole composition. A cosmetic containing the oil-absorbingpowder within these ranges is preferable because the oil-absorbingpowder forms a sequential chain structure in the cosmetic and can absorbsebum effectively, and further homogeneous kneading is facilitated inthe production of the cosmetic.

[0022] In addition, the above-mentioned hydrophobic oil-absorbing powderis preferably contained in an amount of 5% by weight or more, preferably10-40% by weight, of the whole composition.

[0023] The compound of component (B) used in the present inventionessentially should have an affinity for the oil-absorbing powder lowerthan that of sebum, in order to be released in exchange for the sebumwhen the oil-absorbing powder absorbs the sebum. Preferably, thecompound has a solubility in water higher than a solubility in squalane.

[0024] Component (B) includes active ingredients such as humectants,pharmacologically active substances, antibiotics and antiinflammatoryagents; and water-soluble dyestuffs.

[0025] The active ingredients include extracts of animals or plants,amino acids or salts thereof, peptides, proteins, organic acids,vitamins and derivatives thereof, urea and inorganic salts. Morespecifically, the active ingredients include the following substances.

[0026] Extracts of animals and plants: Extracts of animals includeplacenta extract, and water-soluble placenta extract, which iscommercially available and used as a raw material of cosmetics, can beused. For example, products obtained from placenta of mammals such asbovine, swine or human through processings such as washing, removal ofbrood, mincing and freeze drying, followed by extracting water-solublecomponents, and further removing impurities, are included. Plantextracts include, for example, extracts obtained from the followingplants: Angelica keiskei, Vigna angularis (adzuki bean), Catechu, Perseaamericana (avocado), Hydrangea macrophylla, Gynostemma pentaphyllum,Althaea officinalis (marshmallow), Alteca, Arnica montana, Prunus dulcis(almond), Aloe arborescens (candelabra aloe), Prunus armeniaca(apricot), Uritica, Iris, Foeniculum vulgare (fennel), Curcuma longa(turmeric), Rosa multiflora (rose fruit), Scutellaria baicalensis(scutellaria root), Phellodendron amurense (phellodendron bark), Coptisjaponica (coptis rhizome), Hordeum vulgare (barley), Abelmoschusesculentus (okra), Hypericum erectum, Lamium, Ononis, Nasturtiumofficinale (watercress), Diospyros kaki, Pueraria lobata (puerariaroot), Valeriana fauriei (Japanese valerian), Betula (birch), Typha(cattail), Matricaria chamomilla (chamomile), Avena (oats), Glycyrrhizaglobra (glycyrrhiza), Rubus (bramble, raspberry), Actinidia chinensis(kiwi berry), Cinchona succirubra (cinchona bark), Cucumis sativus(cucumber), Japanese apricot seed, Aleurites moluccana (candlenut tree),Gardenia jasminoides (gardenia), Sasa veitchii (kuma bamboo grass),Juglans regia (English walnut), Cinnamomum cassia (cinnamon bark), Morusalba (white mulberry), Gunjo, Gentiana lutea (gentian), Geraniumthunbergii (geranium herb), Magnolia obovata (magnolia bark), Panaxginseng (ginseng), Arctium lappa (edible burdock), Sesamum indicum(sesame), Triticum aestivum (wheat), Symphytum officinale (comfrey),Oryza sativa (rice), Camellia sasanqua (sasanqua), Crocus sativus(saffron), Crataegus cuneata (crataegus), Zanthoxylum piperitum(Japanese pepper) , Lentinus edodes (shiitake), Rehmannia glutinosa(rehmannia root), Lithospermum erythrorhizon (lithospermum root),Perilla frutescens (perilla seed), Tilia (lime), Filipendula(meadowsweet), Paeonia lactiflora (peony root), Zingiber officinale root(ginger), Zingiber officinale (ginger), Acorus calamus root, Betulaplatyphylla var. japonica (Japanese white birch), Lonicera japonica(gold-and-silver flower), Equisetum arvense (common horsetail), Steviarebaudiana (stevia), Hedera helix (English ivy), Crataegus laevigata(white thorn), Sambucus nigra (European elder), Juniperus communis(common juniper), Achillea millefolium (milfoil), Mentha piperita(peppermint), Salvia officinalis (common salvia), Malva sylvestris(cheeses), Cnidium officinale root (cnidium rhizome), savory, Morusbombycis bark (mulberry bark), Glycine max seed (soybean), Zizyphusjujube fruit (jujube fruit), Thymus vulgaris (thyme), Thea sinensis(tea), Syzygium aromaticum bud (clove), Citrus unshiu peel (citrusunshiu peel), Oenothera tetraptera (evening primrose), Camellia japonica(camellia), Centella, Juglans regia var. orientis, Angelica acutilobaroot (Japanese angelica root), Calendula officinalis (common marigold),Prunus persica kernel (peach kernel), Citrus aurantium peel (bitterorange peel), Zea mays seed (corn), Houttuynia cordata, Lycopersiconesculentum (tomato), Daucus carota (carrot), Allium sativum (garlic),wild rose, malt, Ophiopogon japonicus tuber (ophiopogon tuber),Petroselinum crispum (common parsley), Secale cereale (rye), Coixma-yuen, Mentha arvensis leaves (mentha herb), Carica papaya (papaya),Hamamelis virginiane leaves (witch-hazel leaves), Rosa (rose),Chamaecyparis obtuse (hinoki cypress), fucus, Helianthus annuus(sunflower), Eriobotrya japonica (Japanese loquat), Tussilago farfara(coltsfoot), butcher's-broom, Vitis (grape), Placenta, Corylus avellana(European hazelnut), Luffa aegyptiaca (sponge gourd), Carthamustinctorius (bastard saffron), Tilia miqueliana, Paeonia suffruticosa(tree peony), Humulus lupulus (common hop), Macadamia tetraphylla(macadamia nut), Pinus koraiensis (pine kernel), pinecone, Aesculushippocastanum, Melissa officinalis (bee balm), Melilotus officinalis(melilot), Prunus persica (peach), barley malt, Centaurea cyanus(cornflower), Palmae (coconut family), Eucalyptus globules (eucalyptus),Saxifraga stolonifera (strawberry begonia), Citrus junos (Yuzu), Lilium(lily), Coix lachrymal-jobi seed (coix seed), Artemisia princeps, Secalecereole (common rye), Arachis hypogaea (peanut), Lavandula vera(lavender), Malus domestica (common apple), Litchi chinensis (lichi),lettuce, Citrus limon (lemon), Astragalus sinicus (milk vetch),Rosmarinus officinalis (rosemary), Lot, Anthemis nobilis (chamomile),Sanguisorba officinalis (great burnet), young plant of Artemisiacapillaris, Agrimonia pilosa (agrimony), Catalpa ovata fruit (catalpafruit), Thujopsis dolabrata (hiba arborvitae), Euphorbia lathyris seed(caper-spurge), Plectranthus japanicus, immature Citrus aurantium(immature orange), Senkishi, Stellaria media (chickweed), duckweed,Artemisia capillaries, Ginkgo biloba (maidenhair tree), Platycodongrandiflorus (balloon flower), Chrysanthemum, Sasa veitchii (kuma bamboograss), Sapindus mukorossi (Chinese soapberry), and Forsythia suspensa.

[0027] Amino acids or salts thereof: These compounds include forexample, ornithine, tryptophan, lysine, arginine, histidine, canavanine,glutamic acid, aspartic acid, serine, alanine, glycine, leucine,isoleucine, proline, threonine, valine, methionine, cystine, cysteine,hydroxyproline, phenylalanine, tyrosine, hydroxylysine,trimethylglycine, sodium aspartate, potassium aspartate, magnesiumaspartate, calcium aspartate, sodium glutamate, potassium glutamate,magnesium glutamate, calcium glutamate, glutamic acid hydrochloride,cysteine hydrochloride, histidine hydrochloride, histidine acetate,histidine phosphate, lysine hydrochloride, lysine acetate, ornithinehydrochloride, ornithine acetate, tryptophan hydrochloride, glutamatearginine glutamate ornithine, glutamate lysine, aspartate lysine,aspartate ornithide and ε-aminocaproic acid.

[0028] Peptides: They include, for example, tripeptide (Arg-Gly-Asp),tetrapeptide (Arg-Gly-Asp-Ser) (JP-A-02-178207), a peptide representedby the formula (Arg-Pro-Phe-Phe)_(n) (wherein n is an integer of 1-8)(JP-A-62-99315) and albumin.

[0029] Organic acids: They include, for example, citric acid, lacticacid, succinic acid, tartaric acid and kojic acid.

[0030] Vitamins and derivatives thereof: This group include, forexample, vitamin B₁, B₂, B₆, B₁₂ and C, nicotinic acid, folic acid,pantothenic acid, p-aminobenzoic acid and biotin.

[0031] Inorganic acids: They include, for example, magnesium sulfate,potassium sulfate, sodium sulfate, magnesium chloride and sodiumchloride.

[0032] Among these active ingredients, compounds soluble in an aqueousmedium are particularly preferable. A term “soluble in an aqueousmedium” means a component having solubilities in water and in oil asdefined hereinbelow. Namely, it is an active ingredient having asolubility in water of 1% by weight or more, which is almost sufficientamount to exhibit an effect as an active ingredient, and also having asolubility in an representative oil, squalane, of 1% by weight or less.

[0033] Further, a water-soluble dyestuff should be a dyestuff which issoluble in water and does not color or stain the oil-absorbing powder ofcomponent (A). Such a dyestuff should have a solubility in water of0.01% by weight or more, which is almost sufficient solubility forcoloring, and a solubility in a representative oil, squalane, of lessthan 0.01% by weight. Namely, when 0.01% by weight of a dyestuff isadded in squalane, the dyestuff preferably generates precipitation orseparation of the dyestuff without coloring the solution homogeneously.

[0034] Such a water-soluble dyestuff includes, for example,water-soluble colors which are legally permitted to be admixed to acosmetic such as: Blue No. 1 (C.I. 42090), Blue No. 2 (C.I. 73015), BlueNo. 202 (C.I. 42052), Blue No. 203 (C.I. 42052), Blue No. 205 (C.I.42090), Red No. 2 (C.I. 16185), Red No. 3 (C.I. 45430), Red No. 102(C.I. 16255), Red No. 104 (C.I. 45410), Red No. 105 (C.I. 45440), RedNo. 106 (C.I. 45100), Red No. 201 (C.I. 15850), Red No. 213 (C.I.45170), Red No. 214 (C.I. 45170), Red No. 227 (C.I. 17200), Red No. 228(C.I. 12085), Red No. 230 (C.I. 45380), Red No. 231 (C.I. 45410), RedNo. 232 (C.I. 45440), Red No. 401 (C.I. 45190), Red No. 502 (C.I.16155), Red No. 504 (C.I. 14700), Red No. 506 (C.I. 15620), Yellow No. 4(C.I. 19140), Yellow No. 5 (C.I. 15985), Yellow No. 202 (C.I. 45350),Yellow No. 203 (C.I. 47005), Yellow No. 402 (C.I. 18950), Yellow No. 403(C.I. 10316), Yellow No. 406 (C.I. 13065), Yellow No. 407 (C.I. 18820),Green No. 3 (C.I. 42053), Green No. 201 (C.I. 61570), Green No. 204(C.I. 59040), Green No. 205 (C.I. 42095), Green No. 401 (C.I. 10020),Green No. 402 (C.I. 42085), Orange No. 205 (C.I. 15510), Orange No. 207(C.I. 45425), Orange No. 402 (C.I. 14600), Brown No. 201 (C.I. 20170),Purple No. 401 (C.I. 60730), and Black No. 401 (C.I. 20470);water-soluble natural colors such as: flavin dyestuffs (riboflavin,etc.), quinone dyestuffs [laccaic acid, carminic acid (cochineal),kermesic acid, etc.], betacyanin dyestuff (betanin and the like), andflavonoids (safrol yellow, shisonin, rutin, and the like).

[0035] A mixture of two or more of component (B) can be used, and anactive ingredient and a water-soluble dyestuff may also be used incombination. Further, component (B) is contained preferably in an amountof 0.000001-20% by weight of the whole composition. When component (B)is used together with an active ingredient, the active ingredient iscontained preferably in an amount of 0.001-20% by weight, morepreferably 0.01-10% by weight of the whole composition, from theviewpoint of maintaining an effective amount of the active ingredient.In addition, when a water-soluble dyestuff is used, the dyestuff iscontained preferably in an amount of 0.000001-1% by weight, morepreferably 0.0001-0.1% by weight of the whole composition, from theviewpoint of easy confirmation of the removal of the sebum from the skinby a color change due to absorption of the sebum.

[0036] The cosmetic of the present invention is produced by mixingcomponents (A) and (B) and optional components. Component (B) iscontained in the cosmetic in a state homogeneously dispersed andmaintained among the particles or in the porous structure of component(A).

[0037] The cosmetic of the present invention may be made into a formthat can be applied or adhered onto the skin for the purpose ofabsorbing the sebum. For example, a cosmetic can be made into the formof paste, cream, aerosol, lotion, milky lotion, essence or face pack,and a pack cosmetic(face pack) is preferable in view of effectiveness.

[0038] A pack cosmetic is used by applying or adhering onto the skinsuch as face. Dosage form thereof includes, for example, a wash off-typepack cosmetic wherein the cosmetic is applied to absorb the sebum andthen washed off; a peel off- type pack cosmetic wherein after applying,the cosmetic is dried to absorb the sebum, then peeled off; and a sheet-type pack cosmetic wherein the cosmetic removes the sebum as well ashorny plug and smudge of the skin or absorbs the sebum, and then ispeeled off. The sheet-type pack cosmetic is particularly preferable inview of effectiveness.

[0039] In the case of preparing the cosmetic of the present invention inthe form of a pack cosmetic, it is preferable that the pack cosmeticfurther contains, as component (C), a hydrous gel consisting of awater-soluble polymer and a cross-linking agent. The water-solublepolymers herein include polyacrylic acid, polymethacrylic acid,alginate, starch, agar, gelatin, pectin, casein, polyvinyl alcohol,poly(vinyl pyrrolidone) and polyethylene oxide.

[0040] A mixture of two or more of the water-soluble polymers may beused, and is contained preferably in an amount of 1-30% by weight, morepreferably 2-15% by weight of the whole composition.

[0041] A cross-linking agent is a compound which causes a cross-linkingreaction with the above-mentioned water-soluble polymer. Thecross-linking agents include polyvalent metal salts such aswater-soluble salts, for example, calcium chloride, aluminum chloride,potassium alum and aluminum sulfate; and salts slightly soluble in wateror hardly soluble in water, for example, calcium hydroxide, aluminumhydroxide, calcium carbonate, calcium phosphate, aluminum stearate andcalcium citrate.

[0042] The cross-linking agent is preferably added in an amount of0.01-5 equivalents, more preferably 0.1-2 equivalents to thecross-linkable sites of the water-soluble polymer.

[0043] Further, among the pack cosmetics, a sheet-type pack cosmetic canbe produced, for example, by mixing the above-mentioned components,impregnating a substrate fabric with the resulting composition orapplying the composition onto the substrate fabric to form a sheet, and,if necessary, further applying facing with a polyethylene film.Alternatively, a sheet-type pack cosmetic can be obtained by spreadingthe composition on a facing film, covering the resulting film with asubstrate fabric, and cutting the resulting sheet into pieces with apredetermined size.

[0044] The substrate fabric includes knitted or woven fabrics such asflannel and spun rayon; nonwoven fabrics such as felt and spun lace;papers; and plastic sheets.

[0045] The thickness of the substrate fabric is preferably 0.1-2.0 mm,more preferably 0.1-1.0 mm, and the thickness of the coating of thecomposition is preferably 0.1-2.0 mm, more preferably 0.1-1.0 mm. Thetotal thickness is preferably 0.1-4.0 mm, more preferably 0.1-2.0 mm.

[0046] The shape and size of the sheet are not particularly limited, anda patch covering the whole face or a patch partially covering the facecan be used.

[0047] In the case of preparing a peel off-type pack cosmetic as thecosmetic of the present invention, it is preferable to additionally usecomponent (D) consisting of a film-forming water-soluble polymer.

[0048] The film-forming water-soluble polymers include syntheticpolymers such as poly(vinyl alcohol), poly(vinyl pyrrolidone),poly(vinyl acetate), poly(meth)acrylate, polystyrene, polyalkylene oxideand silicone; and natural polymers such as cellulose, starch andproteins.

[0049] A mixture of two or more of the film-forming water-solublepolymer may be used and is contained preferably in an amount of 0.01-70%by weight, more preferably 5-40% by weight of the whole composition.

[0050] The peel off-type pack cosmetic can be produced, for example, bystirring and mixing components (A), (B) and (D) and other optionalcomponents according to a conventional method.

[0051] The cosmetic of the present invention may optionally contain, inaddition to the above components, for example, solid or semisolid oils,liquid oils, hydrocarbons, higher alcohols, higher fatty acids, esters,silicones, lower alcohols, polyhydric alcohols, polysaccharides,synthetic polymer emulsions, surface active agents, thickeners, pHregulating agents, antioxidants, coloring agents, perfumes, antisepticsand water.

[0052] The cosmetic of the present invention is used by applying oradhering onto the face, leaving for about 15 minutes to 10 hours, andpeeling off or washing off. For example, the sheet-type pack cosmeticcan be applied before going to bed and peeled off after waking-up.

[0053] In the present invention, when an active ingredient is used ascomponent (B) and the sebum is absorbed by the oil-absorbing powder inthe applied cosmetic, said active ingredient is released in exchange forthe absorbed sebum, whereby said active ingredient is effectivelyprovided to the skin, and, as a result, the effect is maintained at alower concentration compared with conventional cosmetics which contain ahigh concentration of the active ingredient. And said effect, as well asthe effect of improving oiliness of the skin and worsening in makeup,can be recognized as the effects of the active ingredient such as moist-retaining feeling and moistness feeling when a component having amoisturizing effect is used. When a water-soluble dyestuff is used ascomponent (B), said water-soluble dyestuff is released by absorption ofthe sebum to change the color of the part (for example, the colordisappears and gradually changes to white), and a degree of theabsorption of the sebum or removal of the sebum can be recognized andrealized by the change of color.

EXAMPLE Reference Example 1

[0054] For each of the oil-absorbing powders shown in Table 1, theamount of the absorbed squalane was measured by a method according tothe above-described JIS K 5101. In addition, an average particlediameter of each powder was also measured using a laserdiffraction/scattering type particle size distribution measuringequipment made by Horiba Ltd. TABLE 1 Amount of Average absorbedParticle squalane Diameter (mL/g) (μm) Porous Vinyl Polymer 3.35 6.7(The polymer in Synthesis Example 1 of JP-A-63-316715) Silicone-treatedMica Powder 0.60 18

Reference Example 2

[0055] Solubilityies of 1% by weight of components (1) to (5), and thoseof 0.01% by weight of components (6) and (7) were examined by visualobservation of the dissolving states of the components mixed at 25° C.with water or squalane. The results are shown in Table 2. Criteria forjudgment: TABLE 2 Component (B) Water Squalane (1) Seeweeds Extract ∘ x(2) Hamamelis Extract ∘ x (3) Arthaea Extract ∘ x (4) Hiba Extract ∘ x(5) Dipotassium ∘ x Glycyrrhizinate (6) Blue No.1 ∘ x (7) Purple No.401∘ x

Example 1 Sheet-type Pack Cosmetic

[0056] (Component) (% by weight) (1) Porous Vinyl Polymer (Synthesis25.25 Example 1 in JP-A-63-316715) (2) Glycerol 25.8 (3) SodiumPolyacrylate 5.5 (4) Polyacrylic Acid 0.5 (5) Dry Aluminium HydroxideGel 0.4 (6) Seeweeds Extract 1.1 (7) Hamamelis Extract 0.01 (8) ArthaeaExtract 1.0 (9) Hiba Extract 0.5 (10) Dipotassium Glycyrrhizinate 0.2(11) Methylparaben 0.1 (12) Odorless Menthol 0.05 (13) Ethanol 0.275(14) Purified Water Balance

[0057] (Preparation Method)

[0058] Components (3) to (5) were homogeneously dispersed into component(2) using a kneader, and the resultant mixture was added with components(6) to (11) and (14) followed by homogeneously kneading, then added withcomponent (12) and (13) followed by homogeneously kneading, and furtheradded with component (1) followed by homogeneously kneading, to obtain acosmetic. This cosmetic was uniformly coated (thickness:0.5 mm) on apolyester film, then covered with a nonwoven fabric made of polyester toform a sheet.

Example 2 Pack Cosmetic (Peel-off Type)

[0059] (Component) (% by weight) Porous Vinyl Polymer (Synthesis 25.0Example 1 in JP-A-63-316715) Polyvinyl Alcohol 12.0 Castol Oil hardenedwith 1.0 Polyoxyethylene (40EO) 1-Isostearoyl-3-myristoyl-glycerol 1.0Glycerol 5.0 Seeweeds Extract 1.1 Methylparaben 0.1 Ethanol 7.0 PurifiedWater Balance

[0060] (Preparation Method)

[0061] The components of the above-described composition were stirredand kneaded to produce a peel off-type pack cosmetic.

Example 3 Pack Cosmetic (Wash Off-type)

[0062] (Component) (% by weight) Porous Vinyl Polymer (Synthesis 25.0Example 1 in JP-A-63-316715) Acidic Hetero Polysaccharides 0.1dl-α-Tocopherol Nicotinate 1.0 Castol Oil hardened with 1.0Polyoxyethylene (40EO) 1-Isostearoyl-3-myristoyl-glycerol 1.0Calboxylated Vinyl Polymer 0.5 Glycerol 4.0 L-Arginine 0.5 Methylparaben0.10 Purified Water Balance

[0063] (Preparation Method)

[0064] The components of the above-described composition were stirredand kneaded to produce a pack cosmetic.

Example 4 Cream

[0065] (Component) (% by weight) Porous Vinyl Polymer (Synthesis 30.0Example 1 in JP-A-63-316715) Seeweeds Extract 1.1 Hamamelis Extract 0.01Althaea Extract 1.0 Hiba Extract 0.5 Cross-linked Polyether-modified 2.7Silicone Silicone Oil (10 cs) 27.0 Glycerol 15.0 Sodium Citrate 1.50Methylparaben 0.10 Purified Water Balance

[0066] (Preparation Method)

[0067] The components of the above-described 5 composition were stirredand kneaded to produce a cream.

Example 5 Milky Lotion

[0068] (Component) (% by weight) Porous Vinyl Polymer (Synthesis 15.0Example 1 in JP-A-63-316715) Seeweeds Extract 1.1 Hamamelis Extract 0.01Althaea Extract 1.0 Hiba Extract 0.5 Silicone Oil (6 cs) 2.0 Glycerol15.0 Polyoxyethylenesorbitan 15.0 Monostearate Sorbitan Monostearate 1.5Cetyl Alcohol 1.2 Stearyl Alcohol 0.8 Carboxylated Vinyl Polymer 0.2Potassium Hydroxide 0.05 Methylparaben 0.03 Purified Water Balance

[0069] (Preparation Method)

[0070] The components of the above-described composition were stirredand kneaded to produce a milky lotion.

Comparative Example 1

[0071] The same procedure as in Example 1 was repeated except that thecomponents of seaweeds extract, hamamelis extract, althaea extract, hibaextract and potassium glycyrrhizinate were omitted, to produce asheet-type pack cosmetic.

Comparative Example 2

[0072] The same procedure as in Example 1 was repeated except that asilicone-treated mica powder was used instead of the porous vinylpolymer, to produce a sheet-type pack cosmetic.

Comparative Example 3

[0073] The same procedure as in Example 2 was repeated except that theseaweeds extract was omitted, to produce a peel off-type pack cosmetic.

Comparative Example 4

[0074] The same procedure as in Example 3 was repeated except thatL-arginine was omitted and 0.125% by weight of potassium hydroxide wasadded, to produce a wash off-type pack cosmetic.

Comparative Example 5

[0075] The same procedure as in Example 4 was repeated except that thecomponents of seaweeds extract, hamamelis extract, althaea extract andhiba extract were omitted, to produce a cream.

Comparative Example 6

[0076] The same procedure as in Example 5 was repeated except that thecomponents of seaweeds extract, hamamelis extract, althaea extract andhiba extract were omitted, to produce an milky lotion.

Test Example 1

[0077] Effects of improving oiliness, preventing worsening in makeup andmoistness feeling were evaluated when the cosmetics obtained in Examples1 to 5 and Comparative Examples 1 to 6 were used. The results are shownin Table 3.

[0078] (Evaluation Method)

[0079] (1) Effects of Improving Oiliness and Preventing Worsening inMakeup:

[0080] The sheet-typ pack cosmetics obtained in Example 1, ComparativeExample 1 and Comparative Example 2 were applied onto the faces of 10female panelists, and peeled off after 6 hours. The peel off-type packcosmetics obtained in Example 2 and Comparative Example 3 were appliedto their faces, and peeled off after drying for 30 minutes. The washoff-type pack cosmetics obtained in Example 3 and Comparative Example 4were applied onto their faces, and washed off after being left for 30minutes. Each of the creams and milky lotions obtained in Examples 4 and5 and Comparative Examples 5 and 6 was applied onto their faces, andleft for 30 minutes. Effects of improving oiliness and preventingworsening in makeup brought about by these cosmetics after use wereorganoleptically evaluated, and ranked according to the followingcriteria.

[0081] ◯: Not less than 7 panelists evaluated to be “effective”.

[0082] Δ: From 4 to 6 panelists evaluated to be “effective”.

[0083] X: Not more than 3 panelists evaluated to be “effective”.

[0084] (2) Moistness Feeling

[0085] Similarly as in (1), effects of each cosmetic after use wereevaluated by 10 female panelists and ranked according to the followingcriteria. TABLE 3 Example Comparative Example 1 2 3 4 5 1 2 3 4 5 6Improvement on ◯ ◯ ◯ ◯ ◯ ◯ X Δ Δ Δ Δ Oiliness Prevention of ◯ ◯ ◯ ◯ ◯ ◯X Δ Δ Δ Δ Worsening in Makeup Moistness Feeling ◯ ◯ ◯ ◯ ◯ X Δ X X X X

[0086] All of the cosmetics of the present invention were excellent inimprovement on oiliness, prevention of worsening in makeup and moistnessfeeling.

Example 6 Sheet-type Pack Cosmetic

[0087] (Component) (% by weight) (1) Porous Vinyl Polymer (Synthesis25.25 Example 1 in JP-A-63-316715) (2) Blue No.1 0.005 (3) Glycerol25.80 (4) Sodium Polyacrylate 5.50 (5) Polyacrylic Acid 0.50 (6) DryAluminium Hydroxide Gel 0.40 (7) Methylparaben 0.10 (8) Odorless Menthol0.05 (9) Ethanol 0.275 (10) Purified Water Balance

[0088] (Preparation Method)

[0089] Components (4), (5) and (6) were homogeneously dispersed intocomponent (3) using a kneader, and the resultant mixture was added withcomponents (2), (7) and (10) followed by homogeneously kneading.Subsequently, the mixture was added with component (8) and (9) followedby homogeneously kneading, and further added with component (1) followedby homogeneously kneading, to obtain a cosmetic. This cosmetic wasuniformly applied (thickness:0.5 mm) onto a polyester film, and thencovered with a nonwoven fabric made of polyester to form a sheet.

Example 7

[0090] The same procedure as in Example 6 was repeated except thatpurple No.401 was used instead of blue No.1, to produce a sheet typepack cosmetic.

Example 8 Pack Cosmetic (Peel Off-type)

[0091] (Component) (% by weight) Porous Vinyl Polymer (Synthesis 25.0Example 1 in JP-A-63-316715) Blue No.1 0.005 Polyvinyl Alcohol 12.0Castol Oil hardened with 1.0 Polyoxyethylene (40EO)1-Isostearoyl-3-myristoyl-glycerol 1.0 Glycerol 5.0 Methylparaben 0.10Ethanol 7.00 Purified Water Balance

[0092] (Preparation Method)

[0093] The components of the above-described composition were stirredand kneaded to produce a peel off-type pack cosmetic.

Comparative Example 7

[0094] The same procedure as in Example 6 was repeated except that blueNo.1 was omitted, to produce a peel off-type pack cosmetic.

Comparative Example 8

[0095] The same procedure as in Example 6 was repeated except that asilicone-treated mica powder was used instead of the porous vinylpolymer, to produce a sheet-type pack cosmetic.

Comparative Example 9

[0096] The same procedure as in Example 8 was repeated except that blueNo.1 was omitted, to produce a peel off-type pack cosmetic.

Test Example 2

[0097] The cosmetics obtained in Examples 6 to 8 and ComparativeExamples 7 to 9 were evaluated with regard to improvement on oiliness,prevention of worsening in makeup, as well as color change andeffectiveness feeling. The results are shown in Table 4.

[0098] (Evaluation Method)

[0099] (1) Improvement on Oiliness and Prevention of Worsening inMakeup:

[0100] Evaluation was effected similarly as in Test Example 1.

[0101] (2) Color Changes of Pack Cosmetics:

[0102] Each of the pack cosmetics was examined by a visual examinationafter applying and peeling off, and ranked as “◯” if a color of thesheet on an applied face was changed with a partial disappearance of acolor, and as “X” if the color was not changed.

[0103] (3) Effectiveness Feeling

[0104] Similarly as in (1), each of the pack cosmetics was observed by10 female panelists after applying and peeling off from their faces, andan extent of actual feeling of sebum-removal was judged according to thefollowing criteria. TABLE 4 Comparative Example Example 6 7 8 7 8 9Improvement on ◯ ◯ ◯ ◯ X ◯ Oiliness Prevention of ◯ ◯ ◯ ◯ X Δ Worseningin Makeup Color change of Pack ◯ ◯ ◯ X X X Cosmetic (Disappearance)Effectiveness Feeling ◯ ◯ ◯ X X X

[0105] All of the pack cosmetics obtained in Examples 6 to 8 wereexcellent in improvement on oiliness and prevention of worsening inmakeup, showed clear changes in the color of cosmetics, and had goodactual feelings of effectiveness.

Industrial Applicability

[0106] The cosmetic of the present invention can adequately absorb sebumand thus exhibits an excellent effect of improving or preventingoiliness of the skin and worsening in makeup. By selecting the compoundwhich is released from the cosmetic in exchange for the absorbed sebum,the substance having an ability to improve the skin qualities such asmoistness, tightness and tension can effectively penetrate into theskin, and a bodily feeling of the removal of the sebum can be impartedto users thereby.

What is claimed is:
 1. A cosmetic comprising the following components(A) and (B): (A) an oil-absorbing powder having a squalane-absorbingability of 1 ml/g or more; (B) a compound having an affinity forcomponent (A) which is lower than the affinity of sebum, and having anability to absorb the sebum and release component (B) in exchange forthe sebum when the cosmetic is applied to the skin.
 2. The cosmeticaccording to claim 1, wherein component (B) is one or more compoundsselected from the group consisting of an active ingredient which issoluble in an aqueous medium and a water-soluble dyestuff.
 3. Thecosmetic according to claim 1 or 2, wherein component (A) is a porouspowder having an average particle size of 0.005-30 μm.
 4. The cosmeticaccording to any one of claims 1-3, wherein component (A) is ahydrophobic oil-absorbing powder.
 5. The cosmetic according to any oneof claims 1-4, wherein component (A) is a vinyl polymer obtained bypolymerizing one or more monomers selected from the group consisting ofvinyl acetate, N-vinyl pyrrolidone, methacrylates, acrylates, styreneand divinylbenzene.
 6. The cosmetic according to any one of claims 1-5,wherein component (A) is a porous hydrophobic polymer.
 7. The cosmeticaccording to any one of claims 1-6, wherein component (B) is one or morecompounds selected from the group consisting of humectants,pharmacologically active substances, antibiotics and anti-inflammatoryagents.
 8. The cosmetic according to any one of claims 1-7, whereincomponent (B) is one or more substances selected from the groupconsisting of extracts of animals or plants, amino acids or saltsthereof, peptides, proteins, organic acids, vitamins and derivativesthereof, urea and inorganic salts.
 9. The cosmetic according to any oneof claims 1-8, wherein component (B) is an active ingredient having asolubility in water of 1% by weight or more and a solubility in squalaneof 1% by weight or less.
 10. The cosmetic according to any one of claims1-6, wherein component (B) is a water-soluble dyestuff having asolubility in water of 0.01% by weight or more and a solubility insqualane of less than 0.01% by weight.
 11. The cosmetic according to anyone of claims 1-10, comprising 10-60% by weight of component (A) and0.000001-20% by weight of component (B).
 12. The cosmetic according toany one of claims 1-11, wherein said cosmetic is a pack cosmetic whichfurther contains as component (C) hydrous gel consisting of awater-soluble polymer and a cross-linking agent.
 13. The pack cosmeticaccording to claim 12, wherein said pack cosmetic is a sheet-type pack.14. The cosmetic according to any one of claims 1-11, wherein saidcosmetic is a pack cosmetic which further contains as component (D) afilm-forming water-soluble polymer.